Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 260, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2019.118220
Keywords
Cobalt-doped molybdenum rich molybdenum carbide; Hydrogen production; Noble-metal-free; g-C3H4
Funding
- National Natural Science Foundation of China [21103106,21107069]
- Shanghai Natural Science Foundation [19ZR1420200]
- Science and Technology Commission of Shanghai Municipality [14DZ2261000]
- Shanghai Committee of science and Technology [17DZ2282800]
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Molybdenum rich molybdenum carbide (Mo-Mo2C) has recently been confirmed as a highly effective non-noble-metal cocatalyst to boost the photocatalytic activity of g-C3N4 for water splitting. However, the activity of Mo-Mo2C is still much lower than that of Pt noble metal based cocatalysts for photocatalytic hydrogen production (PHE). This work reports a highly active cobalt (Co) doped Mo-Mo2C cocatalyst (Co(Mo-Mo2C)) for PHE. The hydrogen production rate of 2.0 wt.% optimal Co(Mo-Mo2C) loaded g-C3N4 (2.0 wt.% Co(Mo-Mo2C)/g-C3H4) photocatalyst can be as high as 11,291 mu mol h(-1) g(-1), at 6.7% apparent quantum efficiency (AQE) at 420 nm, which is 1.4 times greater than that of 2.0 wt.% Pt/g-C3N4 photocatalyst. Catalyst characterizations have pointed out that Co doped Mo-Mo2C cocatalyst is able to efficiently suppress photo-generated charge recombination, thus improving the interfacial charge transfer rate, This research provides novel ideas and technical approaches for designing a noble-metal-free, efficient and environmentally friendly cocatalyst for photocatalytic H-2 evolution via water reduction.
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